An online casino is simply a virtual version of a regular casino. You can still find all of the same games you could find at a casino and in some cases you can find even more variations of these games. All of the same rules apply to online casino games, except for how you play. Some formats are a bit different such as slots. Online slots you will have to click a button in order to set the reels in motion.
Nowadays there is no need to wait and plan a special trip in order to gamble. Instead you can just log onto your online account within your web browser and play your games. Sometimes you can even download certain gambling games from these websites. If you choose to play the games from your web browser they are usually in a flash format so you would need an up to date flash player. Another feature you will find is that an online casino especially its slot games have a much higher payout than regular casinos. You will also find a ton of bonuses and special offers all over the web.
No deposit casino offers are probably the most popular online casino. This attracts new players for the simple fact that when you sign up the site will credit your account with free money credits to play the game. Make sure you read the terms carefully though because in order to get payout you most likely will have to wager a bit over what you received as a bonus.